Help Remembering a Book, by it's Cover

I'm looking for an older book that I read as a kid, to add to my collection. Mostly I remember the cover. It had a scantily clad young man, I THINK blonde, on a small raft or boat, standing up, or perhaps seated on the edge higher than his companions. There was also 1 or 2 scantily clad women sitting on the boat, and maybe even another similar looking man with darker hair. I don’t remember the background, but I’m thinking kinda cave like????

I believe the book had something to do with unimaginably immense buildings that humanity lived in, and this young man was looking for a way outside, to see the sky or something, which was of course illegal. I also believe this was a DAW ‘yellow’ book, not too thick, like most of them.

I believe the book had something to do with unimaginably immense buildings that humanity lived in, and this young man was looking for a way outside, to see the sky or something, which was of course illegal.

The summary sounds like AC Clarke's The City and the Stars (or Against the Fall of Night) but that cover could be almost any pulp SF cover

Could it be The Fall of the Towers by Samuel Delany? The cover doesn't sound familiar, but a lot of books had generic covers back then. I don't remember much about the plot, though, and I could be way off.

I'll probably have to get lucky and stumble across it at a used book store. On a side note, is this the same Teresa Edgerton who wrote Goblin Moon? It's currently on my list to get cus i've got The Gnome's Engine in my collection, waiting to be read. Thanks for trying.